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In the second part of the season finale, the team continues to work to find the unsub who is killing prostitutes, and one agent will put her life in danger as they close in on the killer and the motive. Meanwhile, an agent confronts a secret from the past.
In New York, the team closes a case, but there might be more to it when Derek questions a survivor.
Bites, both animal and human send the team to Milwaukee and a shallow grave holding three bodies. Elsewhere, Reid and Penelope start a fitness program they'd like to keep secret from another team member.
The BAU heads to Nevada to catch an UnSub who drowns his victims.
The team consults in Mississippi when a four-year-old goes missing from a relative's home. Meanwhile, during the investigation, some surprising truths are discovered.
The BAU investigates when two female murder victims are found in the Pittsburgh area wrapped in shower curtains. The team soon discover they should be looking for a pair of UnSubs who are working together.
The team searches for JJ whilst uncovering the truth behind her time at the state department. They receive assistance from Emily Prentiss, who returns with vital information.
Rossi heads to Los Angeles to look for his former Marine sergeant, while the team look for a killer in Cleveland.
Penelope must ask her fellow hacker ex-boyfriend to help her and the team solve a case in San Jose.
A rash of murders in Kansas City sends the team there to create a profile of the murderer. Meanwhile, Blake suffers a difficult homecoming as she works with her father and brother to close the case.
The team goes to St. Louis to help profile the abductor of a boy. The case widens, however, when similarities are found between the current case and a cold case.
A burial site found at a house in Virginia challenges the team to profile a case with ties to segregation.
The team travels to Chicago to profile mass murderers believed to be missing teenagers. Elsewhere, Morgan is ambivalent once he realizes his girlfriend's job is as demanding as his own.
Strangulations in Boston sends the BAU to the city to identify a murderer who keeps trophies from his victims. Meanwhile, the team helps Rossi mourn the loss of his favorite bar.
The BAU are called to Utah to investigate ritualistic murders and Penelope plans a Day of the Dead party.
Hotch's stab injury makes him have visions of Hayley and Foyet; meanwhile the BAU looks for a missing teenager.
The BAU meets the new Section Chief and are in pursuit of an UnSub in Baltimore.
The anniversary of The Kennedy Assassination might be a motivator for an UnSub who is striking Dallas.
Still in Arizona, the BAU make a familiar connection that could lead them to their prime murder suspect.
The BAU goes to Arizona to catch a delusional UnSub who thinks that women are out to get him.